UK safety inspectors check all 52 London theaters

A man wraps himself in an emergency foil blanket provided by rescue services following an incident at the Apollo Theatre, in London's Shaftesbury Avenue, Thursday evening, Dec. 19, 2013 during a performance , with police saying there were "a number" of casualties. It wasn't immediately clear if the roof, ceiling or balcony had collapsed. The London Fire Brigade said the theatre was almost full, with around 700 people watching the performance. A spokesman added: "It's thought between 20 and 40 people were injured." (AP Photo by Joel Ryan, Invision)Photo by Joel Ryan